Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
  • C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
  • C07D215/16—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D215/20—Oxygen atoms
  • C07D215/22—Oxygen atoms attached in position 2 or 4
  • C07D215/227—Oxygen atoms attached in position 2 or 4 only one oxygen atom which is attached in position 2
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/02—Drugs for disorders of the nervous system for peripheral neuropathies
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P27/00—Drugs for disorders of the senses
  • A61P27/02—Ophthalmic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P27/00—Drugs for disorders of the senses
  • A61P27/02—Ophthalmic agents
  • A61P27/12—Ophthalmic agents for cataracts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P3/00—Drugs for disorders of the metabolism
  • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P3/00—Drugs for disorders of the metabolism
  • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
  • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D455/00—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
  • C07D455/03—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
  • C07D455/04—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing a quinolizine ring system condensed with only one six-membered carbocyclic ring, e.g. julolidine

Definitions

• This invention relates to novel spiro-quinolone hydantoin derivatives useful in the treatment of certain chronic complications arising from diabetes mellitus, such as diabetic cataracts, retinopathy and neuropathy, to pharmaceutical compositions containing such compounds, and to processes for preparing them.
• Such aldose reductase inhibitors function by inhibiting the activity of the enzyme aldose reductase, which is primarily responsible for regulating the reduction of aldoses such as glucose and galactose to the corresponding polyols, such as sorbitol and galacticol, in humans and other animals. In this way, unwanted accumulations of galacticol in the lens of galactosemic subjects and of sorbitol in the lens, peripheral nervous cord and kidney of various diabetic subjects are prevented or reduced.
• aldose reductase which is primarily responsible for regulating the reduction of aldoses such as glucose and galactose to the corresponding polyols, such as sorbitol and galacticol
• such compounds are of therapeutic value as aldose reductase inhibitors for controlling certain chronic diabetic complications, including those of an ocular nature, since it is known in the art that the presence of polyols in the lens of the eye leads to cataract formation, with a concomitant loss of lens clarity.
• the present invention relates to novel aldose reductase inhibitors useful as therapeutic agents for preventing of alleviating chronic diabetic complications.
• the compounds of the present invention are novel spiro-quinolone hydantoins of the formula and the pharmaceutically acceptable addition salts thereof, wherein n is one or two; and R, and R 2 are each selected from hydrogen, chloro, bromo, fluoro, alkyl of 1 to 3 carbon atoms and alkoxy of 1 to 3 carbon atoms.
• R,, and R" are each selected from hydrogen, chloro and bromo.
• a preferred group of compounds is that wherein n is one, especially where R,, and R Z , are each selected from hydrogen, chloro and bromo.
• Preferred compounds of this group are those wherein R,, and R 2 are each hydrogen and wherein R, is chloro and R 2 is hydrogen.
• the present invention further comprises a compound of the formula (I) or a pharmaceutically acceptable acid addition salt thereof for use in the treatment of a diabetic host to prevent or alleviate diabetes-associated complications, such as cataracts, neuropathy or retinopathy.
• compositions comprising a pharmaceutically.acceptable diluent or carrier together with a compound of formula I or a pharmaceutically acceptable acid addition salt thereof.
• novel compounds of the formula (I) are prepared from appropriately substituted ketones of the formula:
• the ketone starting materials of formula II are prepared from the appropriately substituted 3[1 (2-oxo-1-,2-dihydroquinolin)]-propionitrile, for compounds wherein n is one, or the corresponding -n-butyronitrile, for compounds wherein n is two.
• the nitriles are prepared by the method described by Bates in J. Chem. Soc. 1954, 1153.
• an appropriately substituted 1,2-dihydroquinolin-2-one is reacted with acrylonitrile in an inert organic solvent such as N,N-dimethylformamide at a temperature between about 20°C. and 100°C.
• the nitriles are first hydrolyzed to the corresponding 3[1-(2-oxo-1,2-dihydroquinolin)]propanoic acid or 4-[1-(2-oxo-1,2-dihydroquino!in)]-n-butyric acid by heating in acid, such as hydrochloric acid or formic acid preferably at reflux temperature.
• acid such as hydrochloric acid or formic acid preferably at reflux temperature.
• the acids produced are then heated in the presence of a strong acid such as polyphosphoric acid, sulfuric acid or p-toluene sulfuric acid at a temperature of 75°C. to 150°C. to form the ketones of formula II.
• the reaction may also be effected by reaction of the 3-substituted-propanoic acid or 4-substituted-n-butyric acid with thionyl chloride at a temperature of 10°C. to 40°C. to form the corresponding acid chloride, followed by heating in the presence of a Lewis acid, such as aluminum chloride, in an inert organic solvent such as nitrobenzene or nitromethane.
• a Lewis acid such as aluminum chloride
• an inert organic solvent such as nitrobenzene or nitromethane.
• the 3-[1-(2-oxo-1,2-dihydroquinolin)] propanoic acid or 4-[1-(2-oxo-1,2-dihydroquinolin)]-n-butyric acid intermediates may also be formed by reaction of a 3-halo-propionic acid or 4-halo-n-butyric acid, preferably chloro- or bromo-substituted, with an alkali metal salt of 1,2-dihydroquinol-2- one in the presence of a base such as an alkali metal hydroxide or hydroxide in an inert organic solvent such as dimethylformamide or dimethylacetamide at a temperature of 50° to 150°C.
• a base such as an alkali metal hydroxide or hydroxide
• an inert organic solvent such as dimethylformamide or dimethylacetamide
• the ketone of formula II is then condensed with an alkali metal cyanide, such as sodium cyanide or potassium cyanide, and ammonium carbonate to form the desired spiro-quinolone hydantoin of formula I.
• the reaction is generally conducted in an inert polar organic reaction solvent in which both the reactants and reagents are mutually miscible.
• Preferred organic solvents include, but are not limited to cyclic ethers such as dioxane and tetrahydrofuran, lower alkylene glycols such as ethylene glycol and trimethylene glycol, lower alkanols such as methanol, ethanol and isopropanol and N,N-dialkyl-alkano- amides such as N,N-dimethylformamide, N,N-diethylformamide and N,N-dimethylacetamide.
• the reaction is conducted at a temperature of between 50°C and 150°C, preferably 90°C to 130°C, for a period of 2 hours to 4 days, depending on the temperature employed.
• the proportions of reactants and reagents employed in the reaction can vary to some extent, it is preferable to employ at least a slight molar excess of the alkali metal cyanide reagent with respect to the ketone of formula II in order to obtain the maximum yield.
• the desired product is readily isolated by conventional means, for example by first diluting the reaction mixture with water and then cooling the resultant aqueous solution to room temperature, followed by acidification to afford the desired spiro-quinolone hydantoin in the form of a readily recoverable precipitate.
• compounds of formula I wherein R, or R 2 are hydrogen may be converted by known reaction methods to compounds having other substituent groups, within the scope of the invention, as defined previously.
• such compounds of formula I may be directly halogenated by reaction with a halogen, especially chlorine or bromine, optionally in the presence of a Lewis acid catalyst, for example, aluminum chloride or ferric chloride, the reaction being generally conducted in an inert organic solvent, such as dimethylformamide at a temperature between ­50°C. and 0°C.
• salts can be readily prepared from compounds of formula I by conventional methods.
• these salts may be readily prepared by treating such spiro-quinolone hydantoins with an aqueous solution of the desired pharmaceutically acceptable cation and evaporating the resulting solution to dryness, preferably under reduced pressure.
• a lower alkyl alcohol solution of the compound of formula I may be mixed with an alkoxide of the desired metal and subsequently evaporating the solution to dryness.
• Suitable pharmaceutically acceptable cations for this purpose include, but are not limited to, potassium, sodium, ammonium, calcium and magnesium.
• novel spiro-quinolone hydantoins of formula I are useful as aldose reductase inhibitors, and as such are of therapeutic value in the treatment of chronic complications of diabetes, such as cataracts, retinopathy and neuropathy.
• treatment is meant to include both prevention or alleviation of such conditions.
• the compounds may be administered to a subject in need of treatment by a variety of conventional routes of administration, including orally, parenterally and topically. In general, these compounds will be administered at dosages between 1 and 250 mg/kg body weight of the subject to be treated per day. However, some variation in dosage will necessarily occur depending on the condition of the subject being treated and the person responsible for administration will, in any event, determine the appropriate dose for the individual subject.
• the compounds may be administered alone or in combination with pharmaceutically acceptable carriers, in either single or multiple doses.
• suitable pharmaceutical carriers include inert solid diluents or fillers, sterile aqueous solutions and various organic solvents.
• the pharmaceutical compositions formed by combining the novel compounds of formula I and the pharmaceutically acceptable carriers are then readily administered in a variety of dosage forms such as tablets, powders, lozenges, syrups, injectable solutions and the like.
• These pharmaceutical compositions can, if desired, contain additional ingredients such as flavorings, binders and excipients.
• tablets containing various excipients such as sodium citrate, calcium carbonate and calcium phosphate may be employed along with various disintegrants such as starch, alginic acid and certain complex silicates, together with binding agents such as polyvinylpyrrolidone, sucrose, gelatin and acacia.
• binding agents such as polyvinylpyrrolidone, sucrose, gelatin and acacia.
• lubricating agents such as magnesium stearate, sodium lauryl sulfate and talc are often useful for tableting purposes.
• Solid compositions of a similar type may also be employed as fillers in soft and hard filled gelatin capsules. Preferred materials for this include lactose or milk sugar and high molecular weight polyethylene glycols.
• the essential active ingredient therein may be combined with various sweetening or flavoring agents, coloring matter or dyes and, if desired, emulsifying or suspending agents, together with diluents such as water, ethanol, propylene glycol, glycerin and combinations thereof.
• solutions of the novel spiro-quinolone hydantoins of formula I in sesame or peanut oil or in aqueous propylene glycol may be employed, as well as sterile aqueous solutions of the corresponding water-soluble alkali metal or alkaline earth metal salts previously described.
• aqueous solutions should be suitably buffered if necessary and the liquid diluent first rendered isotonic with sufficient saline or glucose.
• These particular aqueous solutions are especially suitable for intravenous, intramuscular, subcutaneous and intraperitoneal administration.
• the sterile aqueous media employed are all readily available by standard techniques known to those skilled in the art.
• the activity of the compounds of the present invention as agents for the control of chronic diabetic complications may be determined by a number of standard biological or pharmacological tests. Suitable tests include (1) measuring their ability to inhibit the enzyme activity of isolated aldose reductase; (2) measuring their ability to reduce or inhibit sorbitol accumulation in the sciatic nerve of acutely streptozotocinized (i.e.
• diabetic rats (3) measuring their ability to reverse already-elevated sorbitol levels in the sciatic nerve and lens of chronic streptozotocin-induced diabetic rats; (4) measuring their ability to prevent or inhibit galactitol formation in the lens of acutely galactosemic rats; and (5) measuring their ability to delay cataract formation and reduce the severity of lens opacities in chronic galactosemic rats.
• Example 3 The compound of Example 3 (0.539 g, 2.0 mmol) was dissolved in 4 ml of NN-dimethylformamide containing a few crystals of ferric chloride. After cooling to -40°C a 3 ml. solution of N,N dimethylformamide containing chlorine gas (0.142 g, 2.0 mmol) was added dropwise. The mixture was kept at -30°C to -40°C for two hours then allowed to warm to room temperature overnight. 50 ml water was added and a trace residue filtered. The filtrate was evaporated in vacuo to a residue which was triturated with ether. The solid was recrystallized from ethanol; 0.300 g (50%) mp 200-210°C (dec). This material was column chromatographed on silica gel by elution with chloroform:methanol:acetic acid (90:5:5) to give a pure sample of the title compound, mp 199-205°C (dec).
• Examples 3 and 4 were tested for their ability to reduce or inhibit aldose reductase enzyme activity, following the procedure described in United States Patent No. 3,821,383 and based on the procedure of Hayman et. al., Journal of Biological Chemistry, 240, 877 (1965).
• the substrate employed was partially purified aldose reductase enzyme obtained from calf lens. The results obtained with each compound at a concentration of 10 -6 M are expressed as percent inhibition of enzyme activity.
• the compounds of Examples 3 and 4 were tested for their ability to reduce or inhibit sorbitol accumulation in the sciatic nerve of streptozotocinized (i.e. diabetic) rats by the procedure essentially described in United States Patent No. 3,821,383.
• the amount of sorbitol accumulation in the sciatic nerves was measured 27 hours after induction of diabetes.
• the compounds were administered orally at the dose levels indicated at 4, 8 and 24 hours following the administration of streptozotocin.
• the results obtained in this manner are presented below in terms of percent inhibition (%) afforded by the test compound as compared to the case where no compound was administered (i.e. the untreated animal, where sorbitol levels normally rise from approximately 50-100 mM/g. tissue to as high as 400 mM/g. tissue in the 27-hour test period):

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• Pharmacology & Pharmacy (AREA)
• Bioinformatics & Cheminformatics (AREA)
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• 1979
  • 1979-04-04 US US06/026,990 patent/US4193996A/en not_active Expired - Lifetime
• 1980
  • 1980-04-02 EP EP80301046A patent/EP0017477B1/en not_active Expired
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